1. operational thinking: the operational strategy of amusement parks is often to make tourists feel tired when playing with various facilities, and to induce dopamine secretion by a lot of queuing time to make tourists feel more fun.

2. Consumption promotion: A lot of queuing time allows tourists to spend money in shopping and dining areas. If online numbering mode is adopted, tourists may choose other ways to kill time, such as camping on the grass and playing cards on benches, instead of spending money in amusement parks.

3. User experience: Although the online numbering mode is accepted by some people, its experience may not be as good as the actual human queuing. Offline queuing can enhance the interaction and socialization between tourists, while online mode may weaken this interpersonal interaction.

However, it is worth noting that some amusement parks have begun to try to implement the online numbering system. For example, Disney's Genie+ and ILL are one of the online number retrieval systems, although there are problems such as getting up early to grab the number and being outdated. There are also some intelligent queuing systems, such as color card meeting, where customers can queue online directly in advance or within a certain range. In addition, some new online queuing systems can also queue in batches, and visitors can get WeChat reminders to enhance the queuing experience. Therefore, with the progress of science and technology and the change of consumer demand, online number retrieval may be more and more widely used in amusement parks.